Astudy based on a sample of size 25reported
a mean of 76 with a margin of error of 12 for 95%confidence. give
the 95% confidence interval.

The 95% confidence interval is from 64 to 88

Step-by-step explanation:

The confidence interval has two values.

The lower limit, that is the mean subtracted by the margin of error.

The upper limit, that is the mean added to the margin of error.

So the 95% confidence interval is

76-12 to 76+12 = 64 to 88

A biconditional statement has 2 parts : a conditional statement that states "If hypothesis, then conclusion" and a converse statement which states " If conclusion, then hypothesis" . When both these parts are true, then it is called a biconditional statement.

According to this definition: Option C is correct

C. The measures of two angles have a sum of 90º if and only if the angles are complements.